Question 17 of Mathematics examination. I found out after getting back the paper that I could actually solve it. Nervousness during the exam? Or the question looked too difficult to handle? I don't know. All I know is that I can solve it. The construction question I could have done it. A careless mistake due to lack of practice lead to the loss of 5 marks. I could have gotten 74 at least. Shit it. Never mind. I know I can improve on Maths. I have a confirmed A1 for this SA. It's exactly what I expected.

Okay, the question is question 17.

Mr Choy opens an account with a certain investment scheme in which after a period of 3 years, the amount of interest $i is given by the formula


$i = m(1 + r)3 - a2 - m

where $m is the amount of money he invests, r is the fixed interest rate per annum and $a is a negative number representing the administrative fees.

Given that at the time of the investment, r = 0.02 and a = -5, find

(a) the amount of interest Mr Choy will receive after 3 years if he invests $25000,

(b) how much money Mr Choy needs to invest if he wants to earn at least $2000 interest after 3 years.

Calculator can be used.

(a) $i = m(1 + r)3 - a2 - m is equal to $i = m(1 + 0.02)3 - (-5)2 -m.

This is equal to ---> $i = m(1.02)3 - 25 - m

$i = 1.061208m - 25 - m

$i = 0.061208m - 25

We know m is equal to 25000, so

$i = 0.061208(25000) -25

$i = 1530.2 - 25

$i = 1505.2

The interest he will receive is $1505.2.

(b) 2000 = m(1 + r)3 - a2 - m

2000 = m(1.02)3 - 25 - m

2000 = 1.061208m - 25 - m

2000 = 0.061208m - 25

2025 = 0.061208m

2025000000 = 61208m

33083.91 = m

Mr Choy needs to invest $33083.91 in order to earn $2000 interest after 3 years.

I made a careless mistake. I should add 4 marks get 69.

Next, there is the construction question. I went home and did it. I also did it correctly. Give me 5 marks. 69 + 5 = 74.

Yeah, I think I deserve 74. Bloody shit, what's done is done. Next time I'll be the best.

As for Science, I got 70/100. A2. Yes. Happy? Not really. Could have improved.

高级华文考试我得了58/110。 填写词语太容易了, 我得了满分。但是阅读理解非长难, 结果丢了很多分。可是我还及格。在第一和第二学段, 我只考了40+分。我打算做多一点阅读理解, 下一次得更高的分。

The Literary Expressions paper was a complete disaster. The majority of the class failed the comprehension. However, the class performed better for the personal response questions. I only got 12/20 for the personal response questions, due to a terrible reason - I forgot to split my answer into paragraphs. If I had done so, I would have gotten 17-18/20. Also, I should have elaborated more on my answer. But I cannot travel back in time to change my answers. So I'll have to live with it. I think I will get 60-70/100 for LE again.
9/20 + 12/20 = 21/40. ===> 52.5/100.

52.5/100 ===> 15.75%

Composition estimate 25%.

Spelling tests - 9%

Mr Chen's Oral Communications - 7%

Poetry test - 15.2%

Estimated mark - 71.95 (If my compo is good, ha ha.)

Tomorrow getting History marks. What will I get? I don't know. It had better be an A1.